Finding the Fourth Proportional to 20,106.06, 30,158.52 and 5,315.10

Step by Step Solution

1. Step 1: Write the proportion equation
   20,106.06 : 30,158.52 = 5,315.10 : x
2. Step 2: Convert to fraction form
   20,106.06/30,158.52 = 5,315.10/x
3. Step 3: Cross multiply
   20,106.06x = 30,158.52 × 5,315.10
4. Step 4: Simplify right side
   20,106.06x = 160,295,549.65
5. Step 5: Solve for x
   x = 160,295,549.65/20,106.06
6. Step 6: Final answer
   x = 7,972.50